Yes, it was called the Edwards 6700. It was a voice part of the 6500. I know as my moms work had one of these at one point.
It is very rare today and I can’t even find any documentation on it. I know that it came with a microphone, handset for firefigher telephones, and selective/all call paging. I’m not sure if any came with automatic tape decks or anything.
The 6700 is on the left side, it is pretty simple.